Fix punctuation of several Page Info strings

components/pageinfo_strings.grdp

Index: components/pageinfo_strings.grdp
diff --git a/components/pageinfo_strings.grdp b/components/pageinfo_strings.grdp
index d5246fa4098bdf5b113f95afe300bb18672a918c..f5cacbe480cfa0f068966664ea740edc3bc581af 100644
--- a/components/pageinfo_strings.grdp
+++ b/components/pageinfo_strings.grdp
@@ -92,10 +92,10 @@
     Your connection to <ph name="DOMAIN">$1<ex>www.google.com</ex></ph> is encrypted using an obsolete cipher suite.
   </message>
   <message name="IDS_PAGE_INFO_EXTENSION_PAGE" desc="Message to display in the page info bubble when the page you are on is a chrome-extension:// page. This refers to Chrome extensions.">
-    You are viewing an extension page.
+    You're viewing an extension page
   </message>
   <message name="IDS_PAGE_INFO_VIEW_SOURCE_PAGE" desc="Message to display in the page info bubble when you are viewing page sources by using |View page source| option from the right click menu.">
-    You are viewing the source of a web page.
+    You're viewing the source of a web page
   </message>
 
   <if expr="not use_titlecase">